Use pythagorean theorem for all of them
a. 3, 4, 5
3^2+4^2?5^2
9+16?25
25=25
right
b. 5, 6, 7
5^2+6^2=7^2
25+36=49
61>49
acute
c. 64+81=144
145>144
acute
hope this helps!
Well there is 24 hours in a day so 24 - 15 = 9. So he spends 9 hours awake.
W/4 divide the two to find the quotient
Sixteen because if there are eight less tigers than lions at a zoo, then that means you add 8 to get the number of lions
